(I)Graphs of the Form xfy

0 if definedonly is xfxf

noticing; and

drawingfirst by sketched becan ofgraph The xfyxfy

xfy y

x

1

-1

(I)Graphs of the Form xfy

0 if definedonly is xfxf

noticing; and

drawingfirst by sketched becan ofgraph The xfyxfy

domain in the allfor 0 xxf

1 if and 1 if xfxfxfxfxfxf

xfy y

x

1

-1

(I)Graphs of the Form xfy

0 if definedonly is xfxf

noticing; and

drawingfirst by sketched becan ofgraph The xfyxfy

domain in the allfor 0 xxf

1 if and 1 if xfxfxfxfxfxf

implies; xfxf

dxdy

pointsstationarybestillmust pointsstationary

0wherepointscritical are there xf

xfy y

x

1

-1

xfy

xfy y

x

1

-1

xfy

y

x

1

-1

xfy 2